SECURITIES AND EXCHANGE COMMISSION

                     WASHINGTON, D.C.  20549

                          SCHEDULE 13G


            Under the Securities Exchange Act of 1934
                       (Amendment No. 5)*


                          AIRGAS, INC.
         ______________________________________________
                        (Name of Issuer)

                          COMMON STOCK
          _____________________________________________
                 (Title of Class of Securities)

                           009363 10 2
                   __________________________
                         (CUSIP Number)

                        December 31, 2001
     _______________________________________________________
     (Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which
this Schedule is filed:

                    [   ]     Rule 13d-1(b)
                    [ X ]     Rule 13d-1(c)
                    [   ]     Rule 13d-1(d)

*The remainder of this cover page shall be filled out for a
reporting person's initial filing on this form with respect to
the subject class of securities, and for any subsequent amendment
containing information which would alter the disclosures provided
in a prior cover page.

The information required in the remainder of this cover page
shall not be deemed to be "filed" for the purpose of Section 18
of the Securities Exchange Act of 1934 ("Act") or otherwise
subject to the liabilities of that section of the Act but shall
be subject to all other provisions of the Act (however, see the
Notes).

                (Continued on following page(s))

                       Page 1 of 6 pages


CUSIP No.  009363 10 2        13G                 Page 2 of 6 pages
           ___________                                 __   __
___________________________________________________________________

1.  NAME OF REPORTING PERSON
     S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

     Bonnie F. McCausland
___________________________________________________________________
2.  CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*     (a)[   ]
                                                          (b)[ X ]
___________________________________________________________________
3.  SEC USE ONLY

___________________________________________________________________
4.  CITIZENSHIP OR PLACE OF ORGANIZATION

     United States
___________________________________________________________________
                5.  SOLE VOTING POWER

                    1,500
                ___________________________________________________
 NUMBER OF      6.  SHARED VOTING POWER
   SHARES
BENEFICIALLY        9,816,257
  OWNED BY      ___________________________________________________
    EACH        7.  SOLE DISPOSITIVE POWER
 REPORTING
   PERSON           1,500
    WITH
                ___________________________________________________
                8.  SHARED DISPOSITIVE POWER

                    9,816,257
___________________________________________________________________
9.  AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

     9,817,757
___________________________________________________________________
10.  CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN
     SHARES*
    [   ]
___________________________________________________________________
11.  PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

      14%
___________________________________________________________________
12.  TYPE OF REPORTING PERSON*

     IN
___________________________________________________________________



CUSIP No.  009363 10 2        13G                 Page 3 of 6 pages
           ___________                                 __   __
___________________________________________________________________

Item 1(a) Name of Issuer
          ______________

          Airgas, Inc.


          Item 1(b) Address of Issuer's Principal Executive Offices
          _________________________________________________________

          Airgas, Inc.
          Radnor Court
          259 North Radnor-Chester Road, Suite 100
          Radnor, Pennsylvania 19087-5283


Item 2(a) Name of Person Filing
          _____________________

          Bonnie F. McCausland


Item 2(b) Address of Principal Business Office, or, if none, Residence
          ____________________________________________________________

          612 East Gravers Lane
          Wyndmoor, PA 19038


Item 2(c) Citizenship
          ___________

          United States


Item 2(d) Title of Class of Securities
          ____________________________

          Common Stock, par value $.01 per share

Item 2(e) CUSIP Number
          ___________

          009363 10 2


CUSIP No.  009363 10 2        13G                 Page 4 of 6 pages
           ___________                                __   __
___________________________________________________________________

Item 3     If This Statement is Filed Pursuant to Rule 13d-1(b),
           or 13d-2(b) or (c), Check Whether the Person Filing is a:

       (a) ______ Broker or dealer registered under Section 15
                  of the Exchange Act;

       (b) ______ Bank as defined in Section 3(a)(6) of the
                  Exchange Act;

       (c) ______ Insurance company as defined in Section
                  3(a)(19) of the Exchange Act;

       (d) ______ Investment company registered under Section 8
                  of the Investment Company Act;

       (e) ______ An investment adviser in accordance with Rule
                  13d-1(b)(1)(ii)(E);

       (f) ______ An employee benefit plan or endowment fund in
                  accordance with Rule 13d-1(b)(1)(ii)(F);

       (g) ______ A parent holding company or control person in
                  accordance with Rule 13d-1(b)(1)(ii)(G);

       (h) ______ A savings association as defined in Section
                  3(b) of the Federal Deposit Insurance Act;

       (i) ______ A church plan that is excluded from the definition
                  of an investment company under Section 3(c)(14) of
                  the Investment Company Act;

       (j) ______ Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

Item 4     Ownership
           _________

       (a) and (b) Bonnie F. McCausland beneficially owned an
aggregate of 9,817,757 shares of the issuer's common stock, or
approximately 14% of the shares outstanding, as of December 31,
2001, of which 398,264 shares were issuable upon exercise of
stock options.

       (c) Bonnie F. McCausland had sole power to vote or to
direct the vote, and sole power to dispose or to direct the
disposition of, 1,500 shares of the issuer's common stock.  Mrs.
McCausland had shared power to vote or to direct the vote, and/or
shared power to dispose or to direct the disposition of,
9,816,257 shares of the common stock, which included 398,264
shares issuable upon exercise of stock options held by a trust
for Mrs. McCausland's children of which Mrs. McCausland is a co-
trustee, and 5,063 shares held by a charitable foundation (the
"Foundation") of which Mrs. McCausland is an officer and
director.



CUSIP No.  009363 10 2        13G                 Page 5 of 6 pages
           ___________                                 __   __
___________________________________________________________________

Item 5     Ownership of Five Percent or Less of a Class
           ____________________________________________

           Not applicable

Item 6     Ownership of More than Five Percent on Behalf of Another Person
           _______________________________________________________________

       No other person is known to have the right to receive or
the power to direct the receipt of dividends from, or the
proceeds from the sale of, the issuer's shares which are the
subject of this Amendment to Schedule 13G, except that, with
respect to 9,811,194 shares, members of Mrs. McCausland's family
share with Mrs. McCausland the right, and, with respect to 5,063
shares, the Foundation has the exclusive right, to receive the
dividends from and the proceeds of sale as to such shares.

Item 7     Identification and Classification of the Subsidiary Which
           Acquired the Security Being Reported on By the Parent Holding
           Company
           _____________________________________________________________

           Not Applicable

Item 8     Identification and Classification of Members of the Group
           _________________________________________________________

           Not Applicable

Item 9     Notice of Dissolution of Group
           ______________________________

           Not Applicable

Item 10    Certification
           _____________

       By signing below I certify that, to the best of my
knowledge and belief, the securities referred to above were not
acquired and are not held for the purpose of or with the effect
of changing or influencing the control of the issuer of the
securities and were not acquired and are not held in connection
with or as a participant in any transaction having that purpose
or effect.



CUSIP No.  009363 10 2        13G                 Page 6 of 6 pages
           ___________                                 __   __
___________________________________________________________________


Signature

     After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this
statement is true, complete and correct.



February 12, 2002
__________________________________
Date

/S/Bonnie F. McCausland
__________________________________
Signature


Bonnie F. McCausland
__________________________________
Name/Title